Clamping device for open-side planers



A. R. MQCANN CLAIPING DEVICE FOR OPEN SIDE PLANE-RS March 5, 1929.

Filed June 1927 2 Sheets-Sheet. 1

' INVENTOR. Alfred .M Cann'.

ATTO- 2 Sheets-Sheet 2 Filed June 5, 1927 5 3 8 M \s. l l l l ll l nl HHMHUMHHMHHI N I hHHhn M I III I 1\" V ENTOR. red R.M Cann ATTORN Patented Mar. 5, 1929.

ALFRED R. MCCANN, OF HAMILTON, OHIO.

cnmme DEVICE roa OPEN-SIDE. Jamaicans.

Application filed June 3,

My invention. relates more particularly to knee clamping devices for openside planers. The objects of my invent-ion are to facilitate the clamping of the knee, carrying the rail, to the housing and thereby insuring greater rigidity of the locked knee upon the housing; to enablethe operator to stay in his regular place of operation while clamping or unclamping theknee; to make it unnecessary to use a wrench for loosening certain bolts and nuts used in previous clamping devices, thereby effecting a great saving of time in making the adjustment; to provide a greater surface bearing of the knee on the housing, thereby making it more durable and longer lived and to compensate for the wear of parts by the novel means for making the necessary adjustments. 1

My invention consists in providing the face of the housing with deep wide dovetailed slots, one of which receives'a stationary tapered gib which is providedfor the purpose of ta ing up Wear between the knee and the housing, and the other of which slots is provided with a movable tapering gib whereby on moving said gib longitudinally, the knee is readily and securely clamped to the housing or unclamped therefrom, as desired.

My invention also consists in the construction, combination, location and arrangement 9f parts, as herein set forth and claimed.

In the drawings:

Fig. 1 is a plan view of a metal planing machine having my invention embodied therein;

Fig. 2 is a vertical section on the line 2-2 of Fig. 1;

Fig. 3 is an enlarged detail front elevation of the gib and mechanism used in raising and lowering said gib;

Fig. 4 is a front elevation, on an enlarged scale, showing the worm, worm-wheel and crank suitably mounted within its casing, the cover of which is removed, the crank being shown in dotted lines; and

Fig. 5 is a view partly in section and. partly in elevation the section being on the line 5-5 of Fig. 1.

In the embodiment of my invention as illustrated and which shows a preferred construction, 1 represents the housing of an open side planer, the faceof which is provided with dove-tailed slots 2 and 3, respectively. Knee 4 of the planer isprovided with dove tailed tongues 5 and 6, respectively, which are adapted ,to slidably fit within said slots 2 and 3, respectively. Edges 7 and 8 of tongues 5 and 6, respectively, are tapered towards the bottom of said knee 4,as clearly scribed. The upper end of locking gib 9 terminutes in laterally extending ear 11, which is provided with hole 12 for the purposeof receiving the lowertendlli of screw 14. The

lower end 13 of said screw 14 is fixed within hole 12 ofear 11 by m 15, as showninFi 2. The bevel gear ed upon the top 17 of knee 4 and receives bevel gear 18 and shaft 19 which are frotatably mounted therein. Said bevel gear 18 is rotatably held withinbracket 16 by collar 20 and screw 21. Pinion 22 is fixed upon one end of shaft 19 and is in meshing engagement at all times with bevel gear 18. Fixed to the other end of said shaft 19 is worm wheel 23 suitably mounted within casing 24, asshown in Fig. 4. One end of shaft 25 is rotatably mounted within bearing 26 in casing 24 and worm 27 is secured thereto and is in meshing engagement with worm wheel 23. The other end of said shaft 25xterminates in squared,

racket 16, clearly, il us- 1 trated in Figsr2 and 3, respectively, is mount end 28 for the purpose of receiving hand crank 29. One end of shaft 25 is rotatably supported by shaft bearing 30, the latter being rigidly attached to end 31 of cross rail 32, by bolts 33, as shownin Fig. 1; Adjustable gib 34 is tapered similar to locking gib 9 and fits between edge 8 of knee 4 and edge 35 of housing 1, as clearly shown in Fig. 5.

The upper end of said gib 34 is provided with laterally extended car 36 having hole 37 therein which receives threaded stud 38.

To take up any wear between knee 4 ainl housing 1, simply loosen nut 39 and tighten nut 40, thereby forcing said gib 34 .down wardly. When the locking gib 9 is drawn upwardly, thereby releasing knee 4 upon housing 1, retaining member 41, fixed to said knee 4 by bolts 42, assists in supportin the weight of said knee 4 and cross rail 32, t ereby allowing said knee and rail to be freely raised or lowered upon said housing 1, as dcsired.

The operation of my invention is as follows:

Assume that knee i has been adjusted vertically upon housing 1 to thedesired working position and that it is desired to lock said knee and cross rail upon said housing in said adjusted position, all that is necessary, upon the operator s part, is to turn 0 'ank 29 in a clockwise direction, thereby turning shaft 25 and worm 527 in a similar direction. Said worm being in meshing engagement with worm wheel 23, causes said worm Wheel to be rotated, which, in turn, rotates shaft 19 and pinion Said pinion 22 being in meshing engagement with beveled gear 18 causes said gear to be rotated within bevel gear bracket 16, and thus causes screw lei to move downwardly, which, in turn, imparts downward movement to locking gib 9, thereby wedging said gib between edge 7, of knee i, and edge 10, of housing 1.

To unlock the knee relative to the housing, simply reverse the operation just described, or, in other words, turn crank 29 in an anticlockwise direction, which, in turn, raises locking gibi), or with draws it from \vedging engagement between edge 7, of knee ii, and

edge 10, of housing 1, as previously de- SOIlbGd.

It will be understood, of course, that the usual means such :as screw 43 and other connecting parts not shown for raising and lowering the knee, will be used but form no part of this invention.

Certain changes and modifications of my invention can be made without departing from the scope or spirit thereoi as defined in the claim, as for instance, worm 27 and worm-wheel 23 may be replaced by an ordinary set of bevel gears.

What I claim as new and desire to secure by Letters Patent is:

In a clamping device for an open-side planer having a housing with spacedapart dovetailed vertical slots on its face, a knee having dovetailed tongues adapted to enter and engage the dovetails of said slots, respectively, in combination with a movable gib interposed in one of said slots between said knee and housing, a screw tired to said gib, a bevel gear threaded tosaid screw and retatably mounted upon said knee, a second bevel gear rotatably mounted upon said knee and in permanent meshing engagement with said first-mentioned gear, a shaft, one end of which is lined to said second bevel gear, a worm wheel lixcd to the other end of said shaft, a worm meshing with said worm wheel, and manually operative means for turning said worm whereby said gib'is adapted to be moved into wedging engagement between said knee and housing, or withdrawn from wedging action between said knee and housing at will.

ALFRED MOCANN. 

